Abstract <p>The physiological role of biomineralization in plants is very diverse, with the main function being to help plants adapt to environmental factors. In addition to physiological significance, the formation of structural biominerals in plants is of great importance for paleoevironmental reconstructions, phylogenetic studies, assessment of the biogeochemical cycle of carbon and other elements, as well as for the use of biominerals in a wide range of technologies. This study investigated the presence and distribution of minerals in the pericarp of eremocarps of six species from different tribes of the Boraginaceae family. Scanning electron microscopy, energy dispersive X-ray spectroscopy, Raman spectroscopy and X-ray diffraction analysis were used to identify biominerals. Amorphous silica and calcium carbonate in the form of calcite were identified as structural biominerals presented in the pericarps of species examined. While silica was deposited generally in the cell walls, calcite was found to precipitate in the intracellular and pore spaces. This structural localization of biominerals may indicate differences in their functions and genetic control of formation. Significant diversity in the intensity of biomineralization and distribution of biominerals can be largely related to plant ecology.</p>